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Table II-1 <br /> ' FEATURES DIRECTLY AFFECTING WEST VALLEY SPILLAGE <br /> AND LOCAL DRAINAGE - HIGHWAY 36 TO NEAR THE WELLMAN DITCH <br /> ' SOUTH BOULDER CREEK WEST VALLEY OVERFLOW <br /> • Spill above Highway 36 [H] Highway 36 from Viele culvert [M] <br /> ' Spill above Arapahoe Road to and [H] west to Basin Divide <br /> including Wellman Ditch Lower drainage network through [M] <br /> Channel, diversion, and backwater Highway 36 and downstream <br /> characteristics downstream of [M] along Foothills to near Baseline <br /> ' Highway 36 Foothills and Baseline Intersection [H] <br /> including two storages with <br /> DRY CREEK NO. 2 DITCH controls, storm sewers, roadway <br /> grades <br /> • Culvert under Highway 36 [H] Westerly subbasin drainage [M] <br /> including adjacent ditch and local characteristics influencing <br /> drainage culverts under Highway discharge characteristics to South <br /> 36 Boulder and Bear Creek <br /> ' Spill structure and crossing of [H] watersheds <br /> South Boulder Road Crossover Ditch from Foothills to [H] <br /> Ditch, culvert, pipe and related [L] Dry Creek No. 2 along Baseline <br /> storm sewers, minor spills, South Lower Flatirons levee and culvert [M] <br /> • Boulder Road to downstream of under the on ramp to Viele <br /> Baseline Street drainage and subdivision [M] <br /> 55th Ditch from Baseline to Euclid [Ml characteristics north of Baseline <br /> • 55th Ditch from Euclid to [H] Street drainage and subdivision [M] <br /> • downstream of the Wellman characteristics north of Wellman <br /> Downstream of 55th [M] Golf course and industrial/ [L] <br /> commercial area north of Wellman <br /> VIELE DRAINAGE SYSTEM <br /> • Wellman Ditch <br /> Upper Basin conveyance network IMI <br /> Upper Viele storages [M] Bear Creek diversion and canal [H] <br /> • Viele storages and culverts at [H] crossing to and including Wellman <br /> • Interchange box culvert under Foothills <br /> Lower Viele outfall channel [M] Canal flow and levee [H] <br /> characteristics from Foothills to <br /> ANDERSON DITCH SYSTEM 55th <br /> • Canal flow and levee [H] <br /> Diversion and spillage from Bear [H] characteristics from 55th to South <br /> Creek Boulder Creek <br /> • Anderson conveyance system [LI <br /> • from Broadway to Interchange <br /> Anderson Ditch culvert entrance <br /> and multiple pipe conveyance [M] <br /> under Interchange, and blockage <br /> • issues <br /> Anderson Ditch system east of [M] <br /> Foothills through off ramp area to <br /> next culvert downstream, through <br /> • likely spill zone <br /> Anderson Ditch system east to [L] <br /> spill zone <br /> • Anderson Ditch spill to Viele [M] <br /> • Anderson Ditch to South Boulder [L] <br /> Creek <br /> ' II - 6 <br /> 1 <br />